Food Frequency Questionnaire for Chinese Pregnant Women
Reproducibility and Relative Validity of a Semi-quantitative Food Frequency Questionnaire for Chinese Pregnant Women in Hong Kong
The present study aims to evaluate the reproducibility and relative validity of a semi-quantitative food frequency questionnaire (FFQ) to assess food group consumption and nutrient intake for Chinese pregnant women in Hong Kong.
A total of 100 apparently healthy pregnant women aged 18 or above and with gestational age of at least 5 weeks willl be recruited from the antenatal clinic of the Prince of Wales Hospital. The research staff will check for eligible subjects, explain study details and invite them to join the study. Written consent will be obtained from all subjects. Various maternal data will be collected using standardized methods and questionnaires, and retrieved from the hospital record.
Each participant will be asked to complete the FFQ twice within 3 to 4 weeks interval (for reproducibility evaluation), and three 24-hour food recalls in between the two administrations of the FFQ as a reference method to validate the FFQ (for validity evaluation). The three 24-hour food recalls will include two weekdays and one weekend day. On the interview day in which the 1st FFQ is administrated (FFQ1), each participant will be explained by trained research staff on how to complete the FFQ by herself with the provision of the food portion booklet. Each participant will be asked to complete the 1st FFQ regarding her intake of various food groups over the past month. The frequency of food group intake will be reported per day, week or month, and portions will be reported based on standard referent portion sizes, as pieces, glasses, cups, spoons, centilitres or grams. Data on use of supplements will be collected by asking subjects to specify the brand, the frequency, and the dosage of supplements used. On the same interview day, participant will also be asked by trained research staff to recall all foods and beverages that have been consumed over the past 24 hours. Food photo albums and eating utensils of standardized portions will be displayed to help recall. The 2nd administration of the FFQ (FFQ2) will be done 3 to 4 weeks after the 1st administration of the FFQ. The FFQ2 and the food portion booklet as well as the additional 24-hour recall forms will be given to the participants by email or post within 3 to 4 weeks after the 1st administration of the FFQ (FFQ1). Between the intervals of two FFQs, the research staff will give phone call to the participant on two separate days to complete two more 24-hour food recalls for validity evaluation purpose. Daily dietary and nutrient intake collected by both FFQs and 24-hour recalls will be entered and calculated using the nutrition analysis software Food Processor Nutrition analysis and Fitness software version 8.0 (ESHA Research, Salem, USA) including local foods selected from food composition tables from China and Hong Kong.
Descripción general del estudio
Estado
Condiciones
Tipo de estudio
Inscripción (Actual)
Contactos y Ubicaciones
Ubicaciones de estudio
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Hong Kong, Porcelana
- The Hong Kong Polytechnic University
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Criterios de participación
Criterio de elegibilidad
Edades elegibles para estudiar
Acepta Voluntarios Saludables
Géneros elegibles para el estudio
Método de muestreo
Población de estudio
Descripción
Inclusion Criteria:
- Should be Hong Kong Chinese citizen
- Should reside normally in Hong Kong
- Age at or above 18 years old
- With antenatal registry in the study hospital
- Singleton pregnancy
- Gestational age of 5 weeks or above
- Could speak and understand Chinese
- Willing to follow the study procedures
Exclusion Criteria:
- Currently participating in any clinical trial or trial with dietary intervention
- Multiple pregnancy
- With any renal, liver or thyroid dysfunction, any other indication of a major medical or psychological illness, as judged by the investigators as ineligible to participate the study
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
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Difference in dietary intakes
Periodo de tiempo: Baseline
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Difference in dietary intakes measured using Food Frequency Questionnaire and multiple 24-hour recalls will be examined
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Baseline
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Medidas de resultado secundarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
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Change in dietary intakes
Periodo de tiempo: Change betwen baseline and one month
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Change in dietary intakes measured using Food Frequency Questionnaire at baseline and one month will be examined
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Change betwen baseline and one month
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Colaboradores e Investigadores
Patrocinador
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio (Actual)
Finalización primaria (Actual)
Finalización del estudio (Actual)
Fechas de registro del estudio
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Actual)
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Más información
Términos relacionados con este estudio
Otros números de identificación del estudio
- 2018.440
Información sobre medicamentos y dispositivos, documentos del estudio
Estudia un producto farmacéutico regulado por la FDA de EE. UU.
Estudia un producto de dispositivo regulado por la FDA de EE. UU.
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